Calender in a paper-making or a coating machine

Abstract

A calender has at least four rollers that are located one above the other. The rollers rotate about roller bearings. The calender is located within a paper-making machine. Each of the rollers is rotatably driven by an independent driving mechanism. At least two of the rollers are heatable. At least 40% of the rollers are soft rollers. The outer coverings of the soft rollers are made of a synthetic material that is not sensitive to marking so that a doctor blade can be applied to the soft rollers. The calender includes a device that inserts a paper guide strip into the calender.

What is claimed is: 
     
       1. A calender being disposed in one of a paper-making and a coating machine, said calender comprising: at least four rollers being disposed one above the other, each of said rollers being rotatably mounted on bearings, each of said rollers being independently rotatably driven, at least two of said rollers being heatable, at least 40% of said rollers being soft rollers, said soft rollers having an outer covering that is made of a synthetic material that is insensitive to marking so that a doctor blade can be applied to said soft roller; and   means for inserting a paper guide strip into said calender, said inserting means including two cables between which said paper guide strip is clamped, said inserting means including a perforated carrying belt that moves at a speed that approximates that of the paper-making machine and, a suction box being disposed proximate to said perforated carrying belt.   
     
     
       2. The calender according to claim 1, wherein at least the rollers disposed between an uppermost roller and a lowermost roller are connected, via levers, to a calender frame. 
     
     
       3. The calender according to claim 2, wherein the heatable rollers are steam heated. 
     
     
       4. The calender according to claim 1, wherein the heatable rollers are steam heated. 
     
     
       5. A calender being disposed in one of a paper-making and a coating machine, said calender comprising: at least four rollers being disposed one above the other, each of said rollers being rotatably mounted on bearings, each of said rollers being independently rotatably driven, at least two of said rollers being heatable, at least 40% of said rollers being soft rollers, said soft rollers having an outer covering that is made of a synthetic material that is insensitive to marking so that a doctor blade can be applied to said soft roller; and   means for inserting a paper guide strip into said calender, said inserting means including a perforated carrying belt that moves at a speed that approximates that of the paper-making machine and, a suction box being disposed proximate to said perforated carrying belt.   
     
     
       6. The calender according to claim 5, wherein at least the rollers disposed between an uppermost roller and a lowermost roller are connected, via levers, to a calender frame. 
     
     
       7. The calender according to claim 6, wherein the heatable rollers are steam heated. 
     
     
       8. The calender according to claim 5, wherein the heatable rollers are steam heated. 
     
     
       9. A calender being disposed in one of a paper-making and a coating machine, said calender comprising: at least four rollers being disposed one above the other, each of said rollers being rotatably mounted on bearings, each of said rollers being independently rotatably driven, at least two of said rollers being heatable, said at least two heatable rollers each having a plurality of peripheral bores for guiding a heating medium, at least 40% of said rollers being soft rollers, said soft rollers having an outer covering that is made of a synthetic material that is insensitive to marking so that a doctor blade can be applied to said soft roller; and   means for inserting a paper guide strip into said calender.   
     
     
       10. The calender according to claim 9, wherein at least the rollers disposed between an uppermost roller and a lowermost roller are connected, via levers, to a calender frame. 
     
     
       11. The calender according to claims 10, wherein the heatable rollers are steam heated. 
     
     
       12. The calender according to claim 9, wherein the heatable rollers are steam heated.